[llvm] [SCEV] Preserve nuw on scaled recurrence start values. (PR #227458)

[Nikita Popov via llvm-commits]

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@@ -10228,7 +10236,7 @@ SCEVUse ScalarEvolution::computeSCEVAtScope(const SCEV *V, const Loop *L) {
     // expression has no loop-variant portions.
     for (unsigned i = 0, e = AddRec->getNumOperands(); i != e; ++i) {
       SCEVUse OpAtScope = getSCEVAtScope(AddRec->getOperand(i), L);
-      if (OpAtScope == AddRec->getOperand(i))
+      if (OpAtScope == AddRec->getOperand(i).getPointer())
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nikic wrote:

Why is this change needed?

https://github.com/llvm/llvm-project/pull/227458